First of all you should know that here is your history of your whole google account.
https://myactivity.google.com
https://myactivity.google.com
Delete Youtube History Using Computer
Go to https://www.youtube.com/feed/history- On the right side, below all the options. You will see delete and pause options.
- Click CLEAR ALL WATCH HISTORY to delete history.
- Click PAUSE WATCH HISTORY to stop creating history.
Delete Youtube History Using Phone
- Open Youtube App.
- Go to profile icon, on the top-right corner.
- Go to Settings.
- Go to History and Privacy.
- Clear Watch History or Clear Search History.
- Pause Watch History or Pause Search History.
